Max killing



(No Model.)

M. KELLI-NG.

FIRE PROOF DOOR.

No. 425,804. Patented Apr. 15, 1890.-

UNITED STATES PATENT OFFICE.

MAX KELLING, OF NEWV YORK, N. Y.

FIRE-PROOF DOOR.

SPECIFICATION forming part of Letters Patent No. 425,804, dated April 15, 1890.

Application filed November 27, 1889. Serial No. 331,759. (No model.)

To all whom it may concern:

Be it known that I, MAX KELLING, of New York, in the county and State of New York, have invented a certain new and useful Im- 5 provement in Fire-Proof Doors for Dumb- Waiters, of which the following is a specification.

My improvement relates to the openings of dumb-waiters on the different fioors in buildings, and has for its object to provide the same with fire-proof doors, so as to prevent the passage-ways from being a source of dangerin case of fire.

I will describe a dumb-waiter opening pror vided with doors according to my improvement, and then point out the novel features in the claims.

In the accompanying drawings, Figure 1 is a front View of the opening of a dumb-Waiter as it appears from the apartment to which it belongs. Fig. 2 is a central vertical sect-ion of the same on the line y y of Fig. 1, andin which counter-balance weights are not shown. Fig. 3 is a horizontal section. Fig. at is a sectional frontview of part of a door and the opening in which it fits. Fig. 5 is an enlarged horizontal section of a portion of a door.

Similar letters of reference designate corresponding parts in all the figures.

A designates the opening in the passage- Way of a dumb-waiter. Its edges may be formed of brick or made in any other desirable manner. They will be faced with a frame B, (here shown as consisting of jambs 3 5 or upright portions 1) b and a lintel b This frame may be set upon a sill b of any suitable construction. I make the frame of sheet metal-as, for instance, sheet-iron galvanized or painted or otherwise decorated. It is made to completely surround the opposite faces of the surfaces of the opening A, as may be clearly understood by reference to Figs. 2 and 3. It will be seen from these figures that each part of the frame consists of a face-plate l, fitting against an adjacent surface of the opening A, a flange-like plate 2, united to the former and fitting against the inner side of the passage-way adjacent to the opening, and a front plate 3, united to the plate 1 and extending over that face of the wall in the compartment which is provided with the opening A and outside of the passage-way. The front plate 3 will preferably be made ornamental with headings or moldings.

Each of the j ambs is provided with three Vertical ribs 12 11 17 These are made integral with the plate 1 bybending the same between its side edges, and the plates 2 and 3 are also formed integral with the plate 1. These ribs form slideways for vertically-sliding doors 0 G which are made of sheet-iron doubled and struck up to form panels, so as to give them the requisite stiffness. These doors may have stiff iron frames 0 in addition to the sheet-iron.

Either of the doors may be moved upward or both may be moved upward together for the purpose of affording access to the passage-way of the dumb-Waiter. Preferably the doors will be counterbalanced by weights connected to cords or chains 0. The lower door 0 is provided with a spring-catch 0 engaging with the sill or an appurtenance thereof. The upper door may also have a springcatch c engaging with the lower door, if desired. The upper part of the opening in the passage-Way is shown as closed by a plate \Vhat I claim as mv invention, and desire to secure by Letters Patent, is

.1. The combination, with the passage-way of an elevator having an opening, of a metal frame fitted to said opening, consisting of the integral plates 1 2 3, the plate 1 having integral ribs, the sheet-metal doors 0 sliding between said ribs, and the metal plate 0 fitted in the upper portion of the opening, substantially as specified.

2. The combination, with the passage-way of an elevator having an opening, of a metal frame fitted to said opening and having jambs made of sheet metal, comprising integral plates 1 2 3, the plate 1 being bent to form ribs b b N, substantially as specified.

3. The combination, with the passage-way of an elevator having an opening, of a casing in said opening, sliding doors consisting of sheet metal doubled and having panels formed therein, iron frames in said doors, counterbalance-weights for the doors, and a metal plate secured in the upper part of the casing,

substantially as specified.

MAX KELLING.

Witnesses:

O. R. FERGUSON, S. O. EDMONDS. 

